Knights Armament Company URX 3.1 5.56mm Rail Handguard - 13.5in

The Knight's Armament Corp. Upper Receiver Extending (URX) Rail system is one of the most trusted and proven tactical free floating rails on the market.  Given that KAC invented the railed fore-end in the early 90s, this rail system allows for rock-solid mounting and a classic, early GWOT aesthetic.  

Using a proprietary barrel nut, the URX II and III feature a slick design which requires specialized tools for installation, but yields one of the lowest profile rail profiles available.

This rail is 13.5" long, making it well suited for barrels 14.0" and longer.